[3dem] Old Gatan 626 with new controller?

[Bowman, Valorie D]

We replaced the plug in the 626 with one with 7 holes.   Our former scope manager was an electrical engineer;  I don't know what magic he performed inside the electronics of the 626.  I'm sure there are others out there that could do the same.

Cheers,

Valorie
Valorie Bowman

vdb at purdue.edu
494-5643
EM Facility Laboratory Manager/
Senior Research Electron Microscopist
Purdue Cryo EM Facility
Purdue University

________________________________________
From: 3dem <3dem-bounces at ncmir.ucsd.edu> on behalf of Buecker, Robert <robert.buecker at mpsd.mpg.de>
Sent: Thursday, January 4, 2018 10:42 AM
To: 3dem at ncmir.ucsd.edu
Subject: [3dem] Old Gatan 626 with new controller?

Dear Colleagues,

we are currently trying to re-activate a Gatan 626 cryo arm (Philips version) built in 1985 (black dewar, instead of the new grey ones) for use in a Tecnai F20. We received it "as is", without controller.
Our first attempt at using a Model 900 controller (from a newer JEOL-type 626) on it was unsuccessful, the temperature shown was significantly off (roughly at room temperature when the arm was cooled).
We noticed that the old arm has only 5 contact pins (2x Heating, 2x Sense, 1x GND), whereas the new one has 7, and suspect that this difference (4-wire measurement on a thermistor maybe?) causes the incompatibility.
Did anybody encounter that problem and know how to make the old arm work with the 900 controller?

Cheers,
Robert

--
dr. robert bücker
 max planck institute for the structure and dynamics of matter
 atomically resolved dynamics department
 desy bldg. 99 (cfel)
 luruper chaussee 149
 22761 hamburg, germany
 tel. +49 40 8998-6278 / -86043
 mob. +49 157 70210628

 robert.buecker at mpsd.mpg.de
 http://www.mpsd.mpg.de/68786/Femtosecond_Diffraction


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